I'm seeing suggestions for bikes than can handle up to 40c tires. you may be limiting yourself, and missing out on the fun a 650b x 47c or bigger wheelset offers. and it doesn't mean going slow. I know enough who ride the 47 width size tires which are becoming more popular, who can drop me with nary any effort. even riding 650b x 2.1.
eric/fresno, ca.